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If the outside air temperature is -2 °C, determine the rate of heat loss through the windoes of this wall. Assume radiation heat transfer to be negligible.
The friction between the bed of the truck and the cylinder is sufficent to prevent slipping. Find (a) the time necessary for the cylinder to roll off the truck and (b) the distance the truck travles
A surface area of 1.5 m2. Find the final volume of the argon, the total work for the process and the total heat transfer needed. How long will the process take?
The top and sides are exposed to room air at 25oC with a convection coefficient of h = 80 W/m2K. Neglect the bottom and find the transistor surface temperature.
More heat is transferred until the pressure inside the cylinder also doubles. Determine the work done and the amount of heat transfer for this process.
Based on the above conditions, determine the error when the transducer is used to measure a harmonic pressure signal of 1600 Hz. What is the phase angle between the input and output at this frequency?
The coeficient of kinetic friction between the crate and the incline is 0.25. If the crate moves up 6m in 4 sec then what is the force on the rope?
If the maximum tension the cable can withstand is 100N, and the coeficient of kinetic friction is muk=0.1, determine how long it takes the cable to snap. Motion is in the clockwise direction.
Determine an appropriate summertime indoor design temperature for an exercise area located within an office complex. The space is used by employees before/after work and during lunchtime.
The temperature at the end of the isentropic expansion process is 800 K. Using specific heat values at room temperature, determine the highest temperature and pressure in the cycle.
The mass flow rate of the refrigerant is 0.05 kg/s. Show the cycle on a T-s diagram with respect to saturation lines and determine rate of heat removal from the refrigerated space and the power inpu
Draw a schematic of the ideal Rankine cycle and the corresponding T- s diagram. Determine the R-134a mass flow rate needed for this cycle to produce 750 kW of power.
Determine the required mass flow rate of air for a net power output of 70 MW, assuming both the compressor and the turbine have an isentropic efficiency of 100%.
Find the x-component of the vector A -B. For the previous problem, find the angle of the vector A - B measured relative to the positive x-axis.
A turbine is operated with an enthalpy at entrance of 1340 Btu/lbm and an exit enthalpy of 1285 Btu/lbm. If the entrance velocity to the turbine is 150 ft/s.
Find this temperature. (Assume the specific heat of liquid and of gaseous aluminum is 1 170 J/kg · °C, the melting point is 660 °C, the boiling point is 2 450 °C.
Determine if this can be allowed. engine consumes 120 % theoreticl air mixture with gasoline (C8H18) which rises up to 2000k right after combustion but exits engine at 300 C.
For a sensible heater that provides 100,000 Btu/hr and increases the air temperature 35 F, determine the volumetric flow rate (in cfm) of the air exiting the heater.
If a random student came to you and said that his object was to enroll in the class in which he could expect the higher grade point average, which instructor would you recommend?
The turbine and pump have isentropic efficiencies of 88%. For the cycle, determine the net power developed, in hp. The rate of heat transfer to the working fluid passing through the steam generator, i
The distance from the end of the bar touching the ground and the center of the half cylinder is X. Derive a function for the angular acceleration of the bar as it is getting pulled with velocity V,
Compare these fibers as the reinforcing material in PMC materials. In what types of applications might you chose each of them, keeping in mind stiffness, strength, density and cost factors?
Use maxwell relations and prove that the ratio of compressive coefficient at constant temperature to the one at costant entropy is?
Determine the required minimum diameter d of the shaft to the nearest millimeter. Also, find the corresponding angle of twist of gear A relative to gear D. The shaft is rotating at 600 rpm.